<?php

/**
 * Field handler to display the marker for new content.
 */
class views_handler_field_history_user_timestamp extends views_handler_field_node {

    function init(&$view, $options) {
        parent::init($view, $options);
        global $user;
        if ($user->uid) {
            $this->additional_fields['created'] = array('table' => 'node', 'field' => 'created');
            $this->additional_fields['changed'] = array('table' => 'node', 'field' => 'changed');
            if (module_exists('comment') && !empty($this->options['comments'])) {
                $this->additional_fields['last_comment'] = array('table' => 'node_comment_statistics', 'field' => 'last_comment_timestamp');
            }
        }
    }

    function option_definition() {
        $options = parent::option_definition();

        $options['comments'] = array('default' => FALSE);

        return $options;
    }

    function options_form(&$form, &$form_state) {
        parent::options_form($form, $form_state);
        if (module_exists('comment')) {
            $form['comments'] = array(
                '#type' => 'checkbox',
                '#title' => t('Check for new comments as well'),
                '#default_value' => !empty($this->options['comments']),
            );
        }
    }

    function query() {
        // Only add ourselves to the query if logged in.
        global $user;
        if (!$user->uid) {
            return;
        }
        parent::query();
    }

    function render($values) {
        // Let's default to 'read' state.
        // This code shadows node_mark, but it reads from the db directly and
        // we already have that info.
        $mark = MARK_READ;
        global $user;
        if ($user->uid) {
            $last_read = $values->{$this->field_alias};
            $created = $values->{$this->aliases['created']};
            $changed = $values->{$this->aliases['changed']};

            $last_comment = module_exists('comment') && !empty($this->options['comments']) ? $values->{$this->aliases['last_comment']} : 0;

            if (!$last_read && $created > NODE_NEW_LIMIT) {
                $mark = MARK_NEW;
            } elseif ($changed > $last_read && $changed > NODE_NEW_LIMIT) {
                $mark = MARK_UPDATED;
            } elseif ($last_comment > $last_read && $last_comment > NODE_NEW_LIMIT) {
                $mark = MARK_UPDATED;
            }
            return $this->render_link(theme('mark', $mark), $values);
        }
    }

}
